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          取色器
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        <p>chrome97支持了取色器功能，支持用户点击从屏幕取色</p>
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<h2 id="支持检测"><a href="#支持检测" class="headerlink" title="支持检测"></a>支持检测</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">if</span>(!<span class="variable language_">window</span>.<span class="property">EyeDropper</span>)&#123;</span><br><span class="line">    <span class="variable language_">console</span>.<span class="title function_">error</span>(<span class="string">&#x27;不支持滴管api&#x27;</span>)</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="使用实例"><a href="#使用实例" class="headerlink" title="使用实例"></a>使用实例</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">let</span> eye</span><br><span class="line"><span class="keyword">if</span> (<span class="variable language_">window</span>.<span class="property">EyeDropper</span>) &#123;</span><br><span class="line">    eye = <span class="keyword">new</span> <span class="title class_">EyeDropper</span>()</span><br><span class="line">    eye.<span class="title function_">open</span>().<span class="title function_">then</span>(</span><br><span class="line">        <span class="function">(<span class="params">colorResult</span>) =&gt;</span>&#123; <span class="variable language_">console</span>.<span class="title function_">log</span>(colorResult.<span class="property">sRGBHex</span>)&#125;</span><br><span class="line">    ).<span class="title function_">catch</span>(<span class="function"><span class="params">e</span>=&gt;</span>&#123;</span><br><span class="line">        <span class="comment">// 点击esc退出选取时触发</span></span><br><span class="line">        <span class="variable language_">console</span>.<span class="title function_">error</span>(<span class="string">&#x27;用户取消选择颜色&#x27;</span>)</span><br><span class="line">    &#125;)</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="在线运行"><a href="#在线运行" class="headerlink" title="在线运行"></a>在线运行</h2>
 <button id="dropper">点击打开取色器</button>
    <div>
        <label for="colorShow">颜色展示（部分浏览器默认的颜色选择器可能无法观察实时的值）</label>
        <input id="colorShow" type="color" />
    </div>
    <script>
        let eye
        if (window.EyeDropper) {
            eye = new EyeDropper()
        }
        const colorInput = document.querySelector('#colorShow')
        const dropper = document.querySelector('#dropper')
        colorInput.addEventListener('click', (e) => {
            e.preventDefault()
        })
        dropper.addEventListener('click', () => {
            if (!window.EyeDropper) {
                alert('不支持滴管api!')
                return
            }
            eye.open().then(
                (colorResult) => (colorInput.value = colorResult.sRGBHex)
            ).catch(e=>{
                alert('取消了选择!')
            })
        })
    </script>


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